<template>
    <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
      <!--卡片视图-->
     <el-card>
        <!--添加角色按钮区域-->
        <el-row>
        <el-col>
            <el-button type="primary">添加角色</el-button>
        </el-col>
     </el-row>

     <!--角色列表区域-->
     <el-table :data="rolelist" border stripe>
        <!--展开列-->
     <el-table-column type="expand">
        <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
                <!--渲染二级和三级权限-->
                <el-col :span="19">
                 <el-row :class="[i2===0 ? '' : 'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                </el-col>
                <!--渲染三级菜单-->
                <el-col :span="18">
                <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                    {{ item3.authName }}
                </el-tag>
                </el-col>
                </el-row>
                </el-col>
            </el-row>
               
        </template>
     </el-table-column>
        <!--索引列-->
     <el-table-column type="index"></el-table-column>
     <el-table-column label="角色名称" prop="roleName"></el-table-column>
     <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
     <el-table-column label="操作">

        <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>  
        </template>

     </el-table-column>

     </el-table>

     </el-card>
     
    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
    </div>
</template>
<script>
export default{
data(){
    return{
        //所有角色的列表
        rolelist:[],
        //控制分配权限对话框的显示与隐藏
        setRightDialogVisible:false,
        // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
},
created(){
    this.getRolesList()
},
methods:{
   //获取所有角色的列表
   async getRolesList(){
    const{data:res}=await this.$http.get('roles')
    if(res.meta.status!==200){
        return this.$message.error('获取角色列表失败！')
    }
    this.rolelist=res.data
    //console.log(this.rolelist)
   } ,
   //根据ID删除对应的权限
   async removeRightById(role,rightId){
    //弹框
    const confirmResult=await 
    this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)

        if(confirmResult!=='confirm'){
            return this.$message.info('取消了删除！')
        }
      const{data:res}= await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if(res.meta.status!==200){
        return this.$messate.error('删除权限失败！')
      }
      //this.getRolesList() 
      //权限移除重新绑定
      role.children=res.data
      
   },
   //展示分配权限的对话框
   async showSetRightDialog(role){
    this.roleId = role.id
    //获取所有权限的数据
   const{data:res}=await this.$http.get('rights/tree')
   if(res.meta.status!==200){
    return this.$message.error('获取权限数据失败！')
   }
   //获取的数据保存到data中
   this.rightslist=res.data
   //递归获取三级节点的ID
   this.getLeafKeys(role,this.defKeys)
    //控制分配权限对话框的显示与隐藏
    this.setRightDialogVisible=true
   },
   //通过递归的形式，获取角色下所有三级权限的ID，并保存到defkeys数组中
   getLeafKeys(node,arr){
    //如果当前node 节点不包含children属性，则是三级节点
    if(!node.children)
    {
        return arr.push(node.id)
    }
    node.children.forEach(item => 
        this.getLeafKeys(item,arr))
   },
   //监听分配权限对话框的关闭事件
   setRightDialogClosed(){
    this.defKeys=[]
   },
   //点击分配权限
   async allotRights(){
    //拿到新的树型ID号到新的数组
    const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
   }
}
}
</script>
<style lang="less" scoped>
.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}

</style>